A tech number has even number of digits. If the number is split in two equal halves, then the square of sum of these halves is equal to the number itself. Write a program to generate and print all four digits tech numbers.
Example:
Consider the number 3025
Square of sum of the halves of 3025 = (30 + 25)2
= (55)2
= 3025 is a tech number.
public class TechNumbers
{
public static void main(String args[]) {
for (int i = 1000; i <= 9999; i++) {
int secondHalf = i % 100;
int firstHalf = i / 100;
int sum = firstHalf + secondHalf;
if (i == sum * sum)
System.out.println(i);
}
}
}
2025
3025
9801
Press any key to continue . . .
First understand the algorithm carefully. Then study the program line-by-line and compare it with the output. Finally, review the explanation section to strengthen your logic and programming understanding.
Rewrite the program without looking at the code. Modify values, conditions or logic and run it again. This helps improve confidence and strengthens coding skills much faster.